Make Formatter Happy

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>

Sources/P4Lang/Common.swift

@@ -117,4 +117,4 @@ public struct Argument {
     self.argument = argument
     self.index = index
   }
-}
+}

Sources/P4Lang/Expressions.swift

@@ -209,4 +209,4 @@ public struct FunctionCall {
     self.callee = callee
     self.arguments = arguments
   }
-}
+}

Sources/P4Lang/Statement.swift

@@ -62,4 +62,4 @@ public struct ReturnStatement {
   public init(_ value: EvaluatableExpression) {
     self.value = value
   }
-}
+}